I don't see a clear indication that you should use a Gmail account only on Doorbell, but this article mention that some feature on the app on google home won't work on Google workspace: Link a Google Workspace account to the Google Home app
Thanks @MplsCustomer. All my other smart devices are connected to my G-suite account, does that mean that I have to start all over with a personal account if u want the doorbell to integrate with everything else or there is another way around it?!
I believe the sort answer is "no".
I don't know what your "other smart devices" are, but Google Nest says "Some Google Home app features are not available for Google Workspace (formerly G Suite) accounts. To access all Google Home app features available in your country, link a personal Gmail account instead" (https://support.google.com/googlenest/answer/7571892).
And here they say you need a Google Account (i.e., a personal gmail account):
We're sad to see you go. We hope we can make it up to you in the future. We're always here to help if you ever change your mind.
In the meantime, I'll go ahead and lock this thread within 24 hours. If you run into any more questions in the future, please feel free to create a new thread.
All the best,